IDT 552G

DATASHEET
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER
Description
Features
The ICS552-02 is a low skew, single-input to eightoutput clock buffer. The device offers a dual input with
pin select for switching between two clock sources. It is
part of IDT’s ClockBlocksTM family. See the ICS553 for
a 1 to 4 low skew buffer. For more than 8 outputs see
the MK74CBxxx BuffaloTM series of clock drivers.
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IDT makes many non-PLL and PLL based low skew
output devices as well as Zero Delay Buffers to
synchronize clocks. Contact us for all of your clocking
needs.
ICS552-02
Extremely low skew outputs (50ps maximum)
Packaged in 16 pin TSSOP
Pb (lead) free package
Low power CMOS technology
Operating Voltages of 2.5 V to 5 V
Output Enable pin tri-states outputs
5 V tolerant input clocks
Input/Output clock frequency up to 200 MHz
Input clock multiplexer simplifies clock selection
Industrial temperature
Block Diagram
Q0
Q1
Q2
IN A
1
Q3
IN B
0
Q4
Q5
Q6
Q7
S E LA
IDT™ / ICS™ LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER
OE
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LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER
CLOCK MUX AND BUFFER
Pin Assignment
OE
VDD
Q0
Q1
Q2
Q3
GND
INB
1
2
3
4
5
6
7
8
Input Source Select
16
15
14
13
12
11
10
9
SELA
VDD
Q7
Q6
Q5
Q4
GND
INA
SELA
Input
0
INB
1
INA
16 Pin TSSOP
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin
Name
OE
VDD
Q0
Q1
Q2
Q3
GND
INB
INA
GND
Q4
Q5
Q6
Q7
VDD
SELA
Pin
Type
Input
Power
Output
Output
Output
Output
Power
Input
Input
Power
Output
Output
Output
Output
Power
Input
Pin Description
Output Enable. Tri-states outputs when low. Internal pull-up resistor.
Connect to +2.5V, +3.3V or +5.0V. Must be the same as pin 15.
Clock Output 0
Clock Output 1
Clock Output 2
Clock Output 3
Connect to ground.
Clock Input B. 5V tolerant input.
Clock Input A. 5V tolerant input.
Connect to ground.
Clock Output 4
Clock Output 5
Clock Output 6
Clock Output 7
Connect to + 2.5V, +3.3V or +5.0V. Must be the same as pin 2.
Selects either INA or INB. Internal pull-up resistor.
External Components
A minimum number of external components are required for proper operation. Decoupling capacitors of
0.01 µF should be connected between VDD on pin 2 and GND on pin 7, and between VDD on pin 15 and
GND on pin 10, as close to the device as possible. A 33 Ω series terminating resistor should be used on
each clock output if the trace is longer than 1 inch.
To achieve the low output skews that the ICS552-02 is capable of, careful attention must be paid to board
layout. Essentially, all 8 outputs must have identical terminations, identical loads, and identical trace
geometries. If they do not, the output skew will be degraded. For example, using a 30Ω series termination
on one output (with 33Ω on the others) will cause at least 15ps of skew.
IDT™ / ICS™ LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER
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LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER
CLOCK MUX AND BUFFER
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS552-02. These ratings,
which are standard values for IDT commercially rated parts, are stress ratings only. Functional operation of
the device at these or any other conditions above those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can
affect product reliability. Electrical parameters are guaranteed only over the recommended operating
temperature range.
Item
Rating
Supply Voltage, VDD
7V
SELA, OE, and all Outputs
-0.5 V to VDD+0.5 V
INA and INB
-0.5V to 5.5V
Ambient Operating Temperature
-40 to +85 ° C
Storage Temperature
-65 to +150 ° C
Junction Temperature
175 ° C
Soldering Temperature
260 ° C
Recommended Operation Conditions
Parameter
Min.
Typ.
Max.
Units
-40
–
+85
°C
+5.25
V
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
+2.375
DC Electrical Characteristics
VDD=2.5 V ±5%, Ambient temperature -40 to +85 ° C, unless stated otherwise
Parameter
Operating Voltage
Symbol
Conditions
VDD
Min.
Typ.
Max.
Units
2.375
2.625
V
VDD/2+0.5
5.5
V
VDD/2-0.5
V
VDD
V
0.7
V
Input High Voltage, INA, INB
VIH
Note 1
Input Low Voltage, INA, INB
VIL
Note 1
Input High Voltage, OE, SELA
VIH
Input Low Voltage, OE, SELA
VIL
Output High Voltage
VOH
IOH = -16 mA
Output Low Voltage
VOL
IOL = 16 mA
Operating Supply Current
IDD
No load, 135 MHz
35
mA
Short Circuit Current
IOS
Each output
60
mA
IDT™ / ICS™ LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER
1.8
3
2
V
0.4
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LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER
CLOCK MUX AND BUFFER
DC Electrical Characteristics (continued)
VDD=3.3 V ±5%, Ambient temperature -40 to +85 ° C, unless stated otherwise
Parameter
Operating Voltage
Symbol
Conditions
VDD
Min.
Typ.
Max.
Units
3.135
3.465
V
VDD/2+0.7
5.5
V
VDD/2-0.7
V
VDD
V
0.8
V
Input High Voltage, INA, INB
VIH
Note 1
Input Low Voltage, INA, INB
VIL
Note 1
Input High Voltage, OE, SELA
VIH
Input Low Voltage, OE, SELA
VIL
Output High Voltage
VOH
IOH = -25 mA
Output Low Voltage
VOL
IOH = 25 mA
Output High Voltage (CMOS
Level)
VOH
IOH = -12 mA
Operating Supply Current
IDD
No load, 135 MHz
50
mA
Short Circuit Current
IOS
Each output
80
mA
2
2.4
V
0.4
VDD-0.4
V
V
VDD=5 V ±5%, Ambient temperature -40 to +85 ° C, unless stated otherwise
Parameter
Operating Voltage
Symbol
Conditions
VDD
Min.
Typ.
Max.
Units
4.75
5.25
V
VDD/2+1
5.5
V
VDD/2-1
V
VDD
V
0.8
V
Input High Voltage, INA, INB
VIH
Note 1
Input Low Voltage, INA, INB
VIL
Note 1
Input High Voltage, OE, SELA
VIH
Input Low Voltage, OE, SELA
VIL
Output High Voltage
VOH
IOH = -35 mA
Output Low Voltage
VOL
IOL = 35 mA
Output High Voltage (CMOS
Level)
VOH
IOH = -12 mA
Operating Supply Current
IDD
No load, 135 MHz
85
mA
Short Circuit Current
IOS
Each output
100
mA
2
2.4
V
0.4
VDD-0.4
V
V
Note: 1. Nominal switching threshold is VDD/2
IDT™ / ICS™ LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER
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LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER
CLOCK MUX AND BUFFER
AC Electrical Characteristics
VDD = 2.5V ±5%, Ambient Temperature -40 to +85 ° C, unless stated otherwise
Parameter
Symbol
Conditions
Input Frequency
Min.
Typ.
0
Max. Units
200
MHz
Output Rise Time
tOR
0.8 to 2.0 V, CL=15 pF
1.0
1.5
ns
Output Fall Time
tOF
2.0 to 0.8 V, CL=15 pF
1.0
1.5
ns
Propagation Delay
Note 1
Output to output skew
Note 2
Input A to Input B skew
Note 3
3.5
Rising edges at VDD/2
ns
0
50
ps
0
50
ps
VDD = 3.3V ±5%, Ambient Temperature -40 to +85 ° C, unless stated otherwise
Parameter
Symbol
Conditions
Input Frequency
Min.
Typ.
0
Max. Units
200
MHz
Output Rise Time
tOR
0.8 to 2.0 V, CL=15 pF
0.6
1.0
ns
Output Fall Time
tOF
2.0 to 0.8 V, CL=15 pF
0.6
1.0
ns
3.0
5.5
ns
0
50
ps
0
50
ps
3.5
ns
Propagation Delay
Note 1
Output to output skew
Note 2
Input A to Input B skew
Note 3
2.0
Rising edges at VDD/2
Part to Part Skew
VDD = 5.0V ±5%, Ambient Temperature -40 to +85 ° C, unless stated otherwise
Parameter
Symbol
Conditions
Input Frequency
Min.
Typ.
0
Max. Units
200
MHz
Output Rise Time
tOR
0.8 to 2.0 V, CL=15 pF
0.3
0.7
ns
Output Fall Time
tOF
2.0 to 0.8 V, CL=15 pF
0.3
0.7
ns
Propagation Delay
Note 1
Output to output skew
Note 2
Input A to Input B skew
Note 3
2.8
Rising edges at VDD/2
ns
0
50
ps
0
50
ps
Notes: 1. With rail-to-rail input clock.
2. Between any two outputs with equal loading.
3. Propagation delay matching through the part.
4. Duty cycle on outputs will match incoming clock duty cycle. Consult IDT for tight duty cycle clock
generators.
IDT™ / ICS™ LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER
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CLOCK MUX AND BUFFER
Package Outline and Package Dimensions (16 pin TSSOP, 4.40 mm Body, 0.65 mm Pitch)
Package dimensions are kept current with JEDEC Publication No. 95, MO-153
16
Millimeters
Symbol
E1
E
IN D EX
AR EA
1
2
D
A
2
Min
A
A1
A2
b
C
D
E
E1
e
L
α
aaa
A
Inches
Max
-1.20
0.05
0.15
0.80
1.05
0.19
0.30
0.09
0.20
4.90
5.1
6.40 BASIC
4.30
4.50
0.65 Basic
0.45
0.75
0°
8°
-0.10
Min
Max
-0.047
0.002
0.006
0.032
0.041
0.007
0.012
0.0035 0.008
0.193
0.201
0.252 BASIC
0.169
0.177
0.0256 Basic
0.018
0.030
0°
8°
-0.004
A
1
c
-C e
S E A T IN G
P LAN E
b
α
L
aaa C
Ordering Information
Part / Order Number
Marking
Shipping Packaging
Package
Temperature
552G-02ILN
552G02IN
Tubes
16-pin TSSOP
-40 to +85 ° C
552G-02ILNT
552G02IN
Tape and Reel
16-pin TSSOP
-40 to +85 ° C
“LN” suffix to the part number are the Pb-Free configuration and are RoHS compliant.
While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT)
assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result
from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial
applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary
environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any
circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or
critical medical instruments.
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For Tech Support
800-345-7015
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Fax: 408-284-2775
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© 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device
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